H2testw allows you to test storage devices for various errors. It is particularly useful for detecting fake USB flast drives and MicroSD cards, where it attempts to detect the actual capacity versus the reported capacity of the memory.
Note: H2testw wipes out all the content on the target device during testing! Be sure to backup the content before testing!
Download H2testw here:
http://www.download3k.com/Install-H2testw.html
